Is this terrorism? Days of riots led by far-right groups have targeted mosques and refugees. But there is little agreement on how we should describe the terrible violence.
Fear on the streets as UK riots grow
Crisis: The Prime Minister called an emergency meeting yesterday in response to a sixth day of escalating violence across Britain, following the fatal stabbing of three young girls in Southport last week. Glossary
Asylum seekers - People who have left their countries due to danger and are seeking refuge elsewhere.
Far-right - A range of ideologies that emphasise social order, racial purity and the elimination of opponents.
Nihilistic - Somebody who does not believe in anything, from religion to moral codes – or a belief that all of these things are bad and need to be destroyed.
Anarchists - A political movement against all forms of authority. Anarchists want to overthrow the current order and systems.
Algeria - A country in northern Africa, home to approximately 45 million people. It was colonised by France before gaining independence in 1962.
Colonists - Members of a government-backed group who move to and settle in a new area. Colonists control the area politically.
IRA - The Irish Republican Army, or IRA, was an unofficial military organization made up of people who wanted an end to British rule in Northern Ireland.
Islamist - An advocate of Islamic fundamentalism. Often used in the West to describe those who believe in imposing Sharia (Islamic law) on societies.
Middle East - The lands around the east of the Mediterranean Sea and Arabia.
Pogroms - Organised massacres of a particular ethnic groups, such as those of Jewish people in Russia and Eastern Europe in the late 19th and early 20th centuries.